All Questions
Tagged with newtonian-gravity conventions
6
questions with no upvoted or accepted answers
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Kepler's Two-Body Problem Choice of Sign
I have been going over the solution to Kepler's problem and there is a subtlety I am missing. The notes I am following (my own notes from a while ago in fact...) get to the following expression
$$
\...
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Confused between potential energies
Let us suppose an object of mass $m$ has been raised $h$ meter above. From definition of gravitational potential energy, the potential energy of the ball should be $-\frac{GMm}{R+h}$. But now let us ...
- 1,179
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Better understanding of the definition of Gravitational Potential as the improper integral $\frac{1}{m}\int^x _{\infty}G\frac{Mm}{x^2}dx$
According to Wikipedia "The gravitational potential $V$ at a distance $x$ from a point mass of mass $M$ can be defined as the work $W$ that needs to be done by an external agent to bring a unit ...
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Gravitational Potential Energy irony
While calculating potential energy of an object with respect to Earth which equals work done to bring it from infinity to that point. The gravitational force and displacement are in same direction, ...
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Contradiction on gravitational potential energy
I was reading the derivation of the gravitational energy of a point mass and I seem to have found a contradiction.
The derivation in my textbook is given as follows:-
Let there me a large fixed ...
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Which is positive work and which is negative work when an object is lifted upwards by force A when already the gravity is acting on it from below?
If I lift a book upwards,then by which force is the negative work done; is it done by the force effected by me or by the force of gravity which is pulling the book from the ground below??
